Uniformity trial of coffee

Uniformity trial of coffee in Caldas Columbia

Usage

data("paez.coffee.uniformity")

Format

A data frame with 4190 observations on the following 5 variables.

plot

plot number

row

row

col

column

year

year

yield

yield per tree, kilograms

Details

The field map on Paez page 56, has plots 1 to 838. The data tables on page 79-97 have data for plots 1 to 900.

Note: The 'row' ordinate in this data would imply that the rows and columns are perpendicular. But the field map on page 56 of Paez shows that the rows are not at a 90-degree angle compared to the columns, but only at a 60-degree angle compared to the columns. In other words, the columns are vertical, and the rows are sloping up and right at about 30 degrees.

Paez looks at blocks that are 1,2,...36 trees in size. Page 30 shows annual CV.

Source

Gilberto Paez Bogarin (1962). Estudios sobre tamano y forma de parcela para ensayos en cafe. Instituto Interamericano de Ciencias Agricolas de la O.E.A. Centro Tropical de Investigacion y Ensenanza para Graduados. Costa Rica. https://hdl.handle.net/11554/1892

References

None

Examples

if (FALSE) { # \dontrun{

library(agridat)
data(paez.coffee.uniformity)
dat <- paez.coffee.uniformity

libs(reshape2, corrgram)
  datt <- acast(dat, plot ~ year)
  corrgram(datt, lower.panel=panel.pts,
           main="paez.coffee.uniformity")


# Not quite right. The rows are not actually horizontal.  See notes above.
libs(desplot)
desplot(dat, yield ~ col*row,subset=year=="Y1",
        tick=TRUE, aspect=1,
        main="paez.coffee.uniformity - Y1")
desplot(dat, yield ~ col*row,subset=year=="Y2",
        tick=TRUE, aspect=1,
        main="paez.coffee.uniformity - Y2")
desplot(dat, yield ~ col*row,subset=year=="Y3",
        tick=TRUE, aspect=1,
        main="paez.coffee.uniformity - Y3")
desplot(dat, yield ~ col*row,subset=year=="Y4",
        tick=TRUE, aspect=1,
        main="paez.coffee.uniformity - Y4")
desplot(dat, yield ~ col*row,subset=year=="Y5",
        tick=TRUE, aspect=1,
        main="paez.coffee.uniformity - Y5")

} # }